I agree with bluerose on sherbet. The mail orders go for crazy money.
I think maybe Applejack might be more popular because of FIM but im not sure. Shes got apples she has pretty colors whats not to love??

80s Glam Rock Pony

I think AJ was a lot of people’s first pony or the pony they remember first getting.

I know I already had ponies but the ones I remember getting (and playing with most) were Shady, Surprise, Wind Whistler (all NSS) and Mirror Mirror. AJ was also a really cool little pony in the very first “pilot/special” episode of MLP.

So Soft Pony, So hard to clean

Dollar Store Baby Fakie

I think that one of the most unappreciated designs are all the SHS, yeah, I get it they are extremely slim and not at all as "normal" ponies, but they are really amazing! (I'd have loved to have one as a Glow 'n Show, along with pegasus and unicorns.)